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  #1  
Old 03-19-2013, 08:48 PM
N941WR's Avatar
N941WR N941WR is offline
 
Join Date: Jan 2005
Location: SC
Posts: 12,887
Default How efficiently can you fly?

I was looking over some pictures from a trip I took this past summer and found this:


That works out like this:
141 Nautical miles per hour / 162 Statute miles per hour

At 3.1 GPH...
45.5 Nautical miles per gallon / 52.3 Statute per gallon

Leaving an hour’s reserve, this works out to a range of:
10.6 hours of flight time that will allow me to fly...
1496 Nautical miles / 1720 Statute miles
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Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html

Last edited by N941WR : 03-19-2013 at 08:53 PM.
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  #2  
Old 03-19-2013, 09:01 PM
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erikpmort erikpmort is offline
 
Join Date: Oct 2012
Location: logan, utah
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Default

Interesting how did you get 3 gallons, when mine reads 3.x gallons at 1800 rpm running up on ground ?
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Rans S-20 low and slow

14 build working on wings
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  #3  
Old 03-19-2013, 09:02 PM
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erikpmort erikpmort is offline
 
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Default

Furthermore I fly at your settings frequently- 2350 rpm 19 mp around 6-7k and see 6 ish gallons sometimes dip in the fives. I don't have a lop indicator though.

I don't have EI like you I wonder If it's that much better. Wow.
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Rans S-20 low and slow

14 build working on wings
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  #4  
Old 03-19-2013, 09:06 PM
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Vlad Vlad is offline
 
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Location: Utah
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Default Super efficient method

Once in a while I pull the red knob all the way out and fly burning 0.0 GPH for several minutes. Who can beat that?
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  #5  
Old 03-19-2013, 09:12 PM
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N941WR N941WR is offline
 
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Location: SC
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Quote:
Originally Posted by Vlad View Post
Once in a while I pull the red knob all the way out and fly burning 0.0 GPH for several minutes. Who can beat that?
^^^PHYSCO^^^
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Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html
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  #6  
Old 03-19-2013, 09:15 PM
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N941WR N941WR is offline
 
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Location: SC
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Quote:
Originally Posted by erikpmort View Post
Interesting how did you get 3 gallons, when mine reads 3.x gallons at 1800 rpm running up on ground ?
It could be the fuel flow you are using and how you have the range set up in the SkiView. I don't recall exactly how mine is configured.
With the aircraft moving, you can get higher RPM's at the same power setting then when sitting on the ground and the prop is struggling to move through the air.

Quote:
Originally Posted by erikpmort View Post
Furthermore I fly at your settings frequently- 2350 rpm 19 mp around 6-7k and see 6 ish gallons sometimes dip in the fives. I don't have a lop indicator though.

I don't have EI like you I wonder If it's that much better. Wow.
Yes, dual electronic ignition is that much better!
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Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html
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  #7  
Old 03-19-2013, 09:25 PM
jetdriven jetdriven is offline
 
Join Date: May 2012
Location: Houston tx
Posts: 124
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Thats incredible. Thats TWICE what a Mooney 201 can do, and thats the most efficient certified plane in its class. Amazing.
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1977 Mooney 201
Houston, TX
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  #8  
Old 03-19-2013, 09:39 PM
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N941WR N941WR is offline
 
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Quote:
Originally Posted by jetdriven View Post
Thats incredible. Thats TWICE what a Mooney 201 can do, and thats the most efficient certified plane in its class. Amazing.
Look at it this way, our planes share the same MPG per seat numbers.
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Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html
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  #9  
Old 03-19-2013, 09:58 PM
Sig600 Sig600 is offline
 
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Location: KRTS
Posts: 1,798
Default

Those CHT's seem really high for how far back on the power you are. Pretty stellar MPG though!
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  #10  
Old 03-19-2013, 10:07 PM
RetiredRacer RetiredRacer is offline
 
Join Date: Apr 2009
Location: Ipswich QLD Australia
Posts: 245
Default Nearly as good

Bill we just got back from a 259 NM trip through Australia's outback. On our last fuel top-up to get home we were quoted a $100 call out fee. I told him what he could do with his avgas as we believed we had enough to get home (with reserve). I have never tried LOP as I want to get the CHT's more even with some playing around with the baffles, so once at altitude I just pulled the throttle back to 100-105 kts IAS (110-115 kts TAS) and was cruising along at 15 LPH (3,9 GPH) (60% ROP)

Bob
0-235 RV9a
(P-Mags and Rotec TBI)
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